Ben, the Messiah as the second Adam regains the authority that was lost by Adam during the human fall. Right
The Messiah (Jesus) can accuse Satan in front of God. Jesus was victorious over Satan. Jesus was, is, and will be victorious but does the Bible say that He accuses Satan?
God can remove Satan from the position he has usurped for so long because God is on the side of his children (mankind) Well not all mankind ~ John 8:44
During the process of the human fall A&E disobeyed God's words and choose to believe Lucifer's words instead. By doing so they volunteerely put Lucifer in a higher position and rejected God.
We are in a midway position between God and Satan Ehh.. The Bible says that we are seated with Christ at the right hand of the father. ~ Ephesians 2:6
Man has to return to God and regain his position by separating himself from Satan. God cannot do that for us. The Messiah who is not connected to the fall is the one putting Satan back in his place. He can accuse Satan of his sins. Yes, we must repent of sin and separate ourselves from satan but it is Christ that reunites us with the Father. We just make the choice to submit to Him.
Because of our sins, Satan has a case against us. He can accuse us back and tell God that we are not in a position to judge him. Look what we did.
~1 John 2:1 [ Christ Our Advocate ] My little children, I am writing these things to you so that you may not sin. But if anyone does sin, we have an advocate with the Father, Jesus Christ the righteous.
Sorry, it is a long explanation for just a few words